*{
    margin: 0;
    padding: 0;
}
.form-container {
    position: absolute;
    left: 0;
    right: 0;
    width: 720px;
    padding: 35px 35px 15px 35px;
    margin: 20px auto;
}
.operate-container {
    margin-top: 20px;
}
.operate-container .btn-add {
    float: right;
}
.app-container {
    padding: 20px;
}
.table-container {
    margin-top: 20px;
}